Fiberfos 10gm/3.5gm Powder is a combination medicine used in the treatment of constipation. It works by softening the stools, thus helps in the easy passage of stools. Fiberfos 10gm/3.5gm Powder is taken with food in a dose and duration as advised by the doctor. The dose you are given will depend on your condition and how you respond to the medicine. You should keep taking this medicine for as long as your doctor recommends. If you stop treatment too early your symptoms may come back and your condition may worsen. Let your healthcare team know about all other medications you are taking as some may affect, or be affected by this medicine. The most common side effects are flatulence and stomach pain. These are temporary and usually resolve with time. Contact your doctor straight away if you are at all concerned about any of these side effects. Lifestyle modifications like having fiber-rich diet, increase fluid intake and regular exercise can help you to get better results.